Staff Member

To clarify, repairing the mailbox permissions resolved the issue? If so, it simply means the permissions/ownerships for email files/directories for the account were invalid. Running the script corrected them for that account.

I have seen these errors with iPhones too.The problem is in the logfile but the user didn't had a problem sending emails. You posted a dovecot logfile not exim. Are you using SMTP Auth? Or still AUTHRELAY via POP or IMAP?

Not sure if it is a glitch in iOS or dovecot. The whole iOS email client is a bit strange. E.g. changing the Port for SMTP take minutres.
Still wondering what iOS is checking for so long.